I am terrible with kids.

I don't want to have kids of my own, I have made that abundantly clear, in fact I am rarely around them at all. I like to have adult fun, I watch adult cartoons, adult movies, I drink, I swear when with friends, I only do physical activity for excersize or pleasure. Ironically kids love me, every time, don't know what would compell them to find me interesting, I mean I don't play with toys anymore. I'm 21,I try and just be respectful and sit bye idoly because I'm not social at all, kids are they opposite. They ask many questions, many of wich I don't understand because there vocabulary is still forming. They use me as a jungle gym because I'm tall, they want to follow me, go in my room, no one, is allowed in my room, or, no one I didn't invite. I just don't know how to think like a kid anymore, I'm Imature like one but I can't act like one. No one's ever asked me to babysit because I think it's a given that I don't know how to keep children safe. Is it normal that I just can't seem to understand kids at all and have no desire to create them? I just feel like it sounds mean.